Certilogo is Stone Island's official authentication service for many garments. When you are buying pre-owned Stone Island, it is one of the most useful checks available on eligible pieces — but it is not the only thing you should look at.
When did Stone Island start using Certilogo?
Stone Island states that it has used Certilogo technology on Stone Island and Stone Island Shadow Project products since the Spring/Summer 2014 collection. From Autumn/Winter 2020–2021, Stone Island Junior garments were also included. Some product families, including footwear and some accessories, do not carry CLG and QR codes.
Where is the Certilogo code?
On eligible garments, the 12-digit CLG code and QR code are printed on the security label inside the garment. You can enter the code through Stone Island's official authenticity page or scan the QR code on a phone.
What happens when you check a code?
The official Stone Island page redirects the verification process to Certilogo. Follow the questions and instructions shown during that process. Treat the final result as part of your authentication evidence rather than trying to interpret the number yourself.
Certilogo is not the same as an ART number
The Certilogo code is used for authentication. The ART number is a product reference that can help research the season, line or model. Mixing the two up is a common mistake.
Read the Stone Island ART number guide if you are trying to identify the garment rather than authenticate it.
What if a post-2014 garment has no Certilogo?
Do not automatically conclude that it is fake. Stone Island explicitly notes that some product families are exceptions, and dates can be misidentified on pre-owned listings. Check the exact garment type, labels and product history before drawing a conclusion.
Can a genuine-looking label still be copied?
Yes. A label that looks plausible is not enough on its own. The safest approach is to use the official verification process where available and also assess construction, materials, badge, hardware, wash labels and the wider product details.
For the full process, use our Stone Island authentication guide.
Buying pre-owned: a simple Certilogo workflow
- Find the internal security label.
- Check whether the garment is from an era and product family where a Certilogo code would normally be expected.
- Use Stone Island's official authenticity page or the QR code rather than a third-party result screenshot.
- Complete the Certilogo process yourself where possible.
- Cross-check the result against the garment's other details before buying.
If the piece checks out and you are comparing current stock, browse Stone Island or our dedicated Stone Island jackets, hoodies and overshirts.
Official references
For further reading, these are the primary brand resources used to fact-check this guide: